Table 9.1 Veri-Flame Operating Sequence (continued)
BURNER SHUTDOWN
Shutdown is started by opening the operating interlock circuit.
Is voltage present at interlocks?
| Continued operation. |
|
|
|
| YES |
| NO |
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Is post purge selected? |
| ||
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
| YES | NO |
| |
|
|
|
|
|
|
|
|
|
|
NORMAL MESSAGE
POST PURGE
XX
Fuel valves
Is main valve closed switch made?*
FOR PURGE & MODULATING
ERROR MESSAGE #1
UNSAFE AIR SHORT
If switch is opened within 30 seconds, sequence continues. If not, then . . .
ERROR MESSAGE #2 – 30 SECONDS AFTER #1
UNSAFE AIR SHORT
XX:XX:XX LOCKOUT
Alarm energized.
YES NO
Is voltage present at air flow switch?
YES 
NO
ERROR MESSAGE #1
UNSAFE FLAME ON
Fan is energized. If signal is elimi- nated within 30 seconds, se- quence continues. If not, then . .
ERROR MESSAGE #2 – 30 SECONDS AFTER #1
UNSAFE FLAME ON
XX:XX:XX LOCKOUT
Alarm energized.
ERROR MESSAGE
MAIN VALVE FAIL XX:XX:XX LOCKOUT
Fan energized; alarm sounds.
Is flame signal present?
YES | NO |
NORMAL MESSAGE
LIMITS OPEN
TIME = XXXX:XX:XX
* Applies to purge and no purge models only.
Eclipse
37
